Results 41 to 50 of about 2,762,871 (394)

Application of the Hurricane Optimization Algorithm to Estimate Parameters in Single-Phase Transformers Considering Voltage and Current Measures

open access: yesComputers, 2022
In this research paper, a combinatorial optimization approach is proposed for parameter estimation in single-phase transformers considering voltage and current measurements at the transformer terminals.
Brandon Cortés-Caicedo   +2 more
doaj   +1 more source

Efficient Non-parametric Estimation of Multiple Embeddings per Word in Vector Space [PDF]

open access: yesConference on Empirical Methods in Natural Language Processing, 2014
There is rising interest in vector-space word embeddings and their use in NLP, especially given recent methods for their fast estimation at very large scale.
Arvind Neelakantan   +3 more
semanticscholar   +1 more source

The response of exospheric neutral hydrogen to weak geomagnetic disturbances between June 12 and 29, 2008

open access: yesFrontiers in Astronomy and Space Sciences
Stereoscopic remote sensing observations of terrestrial far ultraviolet (Lyman-α at 121.6 nm) emissions at solar minimum have been used to retrieve the time-dependent response of the exospheric 3-D neutral hydrogen (H) density at radial distances of 3–6 ...
Jochen H. Zoennchen   +2 more
doaj   +1 more source

An Unstructured Model for Anaerobic Treatment of Raw Cheese Whey for Volatile Fatty Acids Production

open access: yesEnergies, 2020
The whey is a byproduct of the dairy industry that, if not treated properly, can cause serious environmental pollution problems. Anaerobic treatment is an alternative for its recovery, since, in addition to reducing the organic load.
Claudio B-Arroyo   +5 more
doaj   +1 more source

Performance Analysis of Matrix Pencil Method Applied to High-Resolution Measurement of Supraharmonics

open access: yesEnergies, 2023
Supraharmonics emitted by power electronic equipment will cause electromagnetic interference. However, there is no uniform standard for the measurement of supraharmonics.
Kaite Li   +3 more
doaj   +1 more source

Study of harmonics detection based on parametric spectral estimation method

open access: yesGong-kuang zidonghua, 2016
Three parametric spectral estimation methods including Yule Walker, Burg and Covariance were studied and an improved Covariance method was proposed based on analysis of AR model.
ZHANG Tingzhong   +3 more
doaj   +1 more source

Two-step simulation of piezoelectric properties of porous PZT according to porosity

open access: yesJournal of Asian Ceramic Societies, 2023
Porous piezoelectric materials have been widely used in hydrophone applications owing to their excellent hydrostatic charge constant (dh) and voltage constant (gh).
Il-Gok Hong   +4 more
doaj   +1 more source

Minimum distance estimation of parametric Lorenz curves based on grouped data

open access: yes, 2020
The Lorenz curve, introduced more than 100 years ago, remains as one of the main tools for analysis of inequality. International institutions such as the World Bank collect and publish grouped income data in the form of population and income shares for a
Hajargasht, Gholamreza   +1 more
core   +1 more source

Penalized Estimation in Parametric Frailty Model

open access: yesHeliyon, 2023
Frailty model examines the effect of observable and non-observable factors on time to event data. Presence of collinearity produces unstable estimates of parameters. Therefore, this research focus on the penalized estimation of frailty model and proposed the new estimator which is the extension of ridge and principal component estimators. Simulation is
Marwan H. Ahelali   +2 more
openaire   +3 more sources

Multi-parametric estimation of brain hemodynamics with MR Fingerprinting ASL (MRF-ASL)

open access: yesMagnetic Resonance in Medicine, 2016
Assessment of brain hemodynamics without exogenous contrast agents is of increasing importance in clinical applications. This study aims to develop an MR perfusion technique that can provide noncontrast and multiparametric estimation of hemodynamic ...
P. Su   +6 more
semanticscholar   +1 more source

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